168640057727 has 2 divisors, whose sum is σ = 168640057728. Its totient is φ = 168640057726.

The previous prime is 168640057723. The next prime is 168640057759. The reversal of 168640057727 is 727750046861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168640057727 - 2² = 168640057723 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168640057723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84320028863 + 84320028864.

It is an arithmetic number, because the mean of its divisors is an integer number (84320028864).

Almost surely, 2^168640057727 is an apocalyptic number.

168640057727 is a deficient number, since it is larger than the sum of its proper divisors (1).

168640057727 is an equidigital number, since it uses as much as digits as its factorization.

168640057727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 168640057727 in words is "one hundred sixty-eight billion, six hundred forty million, fifty-seven thousand, seven hundred twenty-seven".